Interchangeable multi-purpose cooking apparatus

ABSTRACT

The interchangeable multi-purpose cooking apparatus may be used as a normal stove, a grill, a frying pan, a barbecue, a baker, a steamer, a poacher, a chip fryer, a fondue or a Chinese wok. With some small modifications it can be used as a pressure cooker or even as a lighting device or a heater. This portable apparatus consists of a heating pan ( 1 ) and a cooking pan ( 2 ) which fits into the heating pan and accessories which allows it to carry out the various cooking operations. The heating unit is a heating pan comprising a heating mechanism and insulation for protection. The heating mechanisms are mutually interchangeable. The heating pan, when upside down fits upon the cooking pan, so that they are also in interchangeable positions.

The invention concerns an interchangeable multi-purpose cooking apparatus that can be used as a normal stove, a grill, a frying pan, a barbecue, a baker, a steamer, a poacher, a chip fryer, a fondue or a Chinese wok. With some small modifications it can be used as a pressure cooker or even as a lighting device or a heater.

Cooking apparatus for different methods of cooking are known from GB-A-760976, U.S. Pat. No. 3,641,926 and DE-U-0112694. But, a unique interchangeable multi-purpose cooking apparatus has been developed which is versatile and has the ability to perform individually almost all common cooking methods. It is an improved and more elaborate version of the electric grill pan, subject to ARIPO patent AP 264 and PCT application PCT/AP96/00002.

The interchangeable multi-purpose cooking apparatus is easy to operate and to clean. It can be a portable unit that is simply stored with the other kitchen appliances and can be used whenever and wherever it is desired. It is versatile and has the ability to carry out almost all common cooking methods. The interchangeable multi-purpose cooking apparatus can be of any suitable size or shape.

The interchangeable multi-purpose cooking apparatus, subject to the invention, contains a heating unit, consisting of a heating pan with different interchangeable heating mechanisms, a cooking pan with accessories to be mounted, on the cooking pan, that are all mutually interchangeable.

The heating unit is a heating pan comprising a heating mechanism and insulation for protection. The heating pan is either electrically heated or by burning a gaseous or liquid fuel. The electric power for the electrically heated pan is drawn from solar energy, or from a generator, or from the main electricity supply. The heating mechanisms are mutually interchangeable, or it may consist of a heating mechanism that can use electricity or gas within the same heating pan. Within this combination unit, it is understood that the heating pan has different compartments to house items such as the battery, the transformer, the solar panels, etc. These compartments may be within the heating pan as shown in Drawing No. 1, or may be separate attachments to the outer bottom of the heating pan, so that they may, be separated from the heating pan and placed in a more convenient place than the top of the heating compartment of the heating pan. The cooking pan fits into the heating pan. The heating pan, when put upside down fits upon the cooking pan, so that they are also in interchangeable positions.

The accessories comprise of:

-   -   A grid,     -   a lid which fixes into the cooking pan,     -   a pan with large openings, fixing into the cooking pan,     -   small cups, fitting into the large openings     -   a plate with small openings that fits into the pan with large         openings,     -   a pan divider,     -   a chip-frying basket,     -   a Chinese wok     -   Fondue forks

The heating pan is provided with heat insulation at the inner or outer side of its heating compartments. A heat resistant structure or feet may be attached at the outer bottom of the heating pan to bear the pan when put down. Provision can be made to extend these feet i.e. by screwing extension legs on their foot ends, so that the heating pan is higher and thus easier to operate when using outside as a barbecue for instance.

Into the heating compartment of the heating pan, the interchangeable multi-purpose cooking apparatus heated electrically is installed an electric coil. The electric element can be 500 to 1200 Watts or whatever suitable wattage. The electric power can be supplied from the mains, from a generator or from solar energy. The power supply can be straight or regulated by a thermostat or time switch.

When heated by electric power supplied by solar panels, a battery and a transformer are installed at the bottom of the heating pan, and they are connected with appropriate wiring. Solar panels are installed in the bottom of the heating pan that can slide out and when exposed to sunlight, will charge the battery. The solar panels when out can be turned around so that the solar cells always face the sun. The solar panels may be removable so that they can be positioned at the most suitable place to receive solar energy. The charged battery by means of the transformer supplies electric power to the heating element in the heating pan.

Into the heating pan of the interchangeable multi-purpose cooking apparatus, heated by a fuel, are mounted the appropriate piping and burner. Also provisions can be made to attach a gas canister directly to the heating pan connected to the gas burner.

Within the combination unit, the heating mechanism may be adapted to accommodate an electric coil, as well as accommodating the gas burner attachments within the same heating compartment.

For using the interchangeable multi-purpose cooking apparatus as a grill, the heating pan is put upside down on the cooking pan. If heated by a fuel a structure is installed that reflects radiant heat downward from the heating pan into the cooking pan. The heating structure may be any suitable shape or size to suit the heating pan. Preferably this structure is a spherical dome, especially when the heating pan has a cylindrical shape. It is understood that the burning device has to be adapted to the kind of fuel used, or this device may consist of a mechanism which is fitted with both electrical as well as gas fuel heating devices. Also the burning device can be removed and replaced by a lighting device.

The interchangeable multi-purpose cooking apparatus can be of any suitable material, such as aluminium, stainless steel, mild steel, ceramics or glass and can be covered by a non-sticking material. A light may be installed in the cooking pan to follow the cooking operation if the heating pan is electrically heated and the cooking pan is made of glass or other transparent material.

It is understood that the interchangeable multi-purpose cooking apparatus can be of any suitable size or shape. However, to be portable, the heating pan should have a diameter of about 35 cm. The cooking pan is a little bit smaller to fit into the heating pan. The heating pan is about 7 cm high and the cooking pan is about 10 cm high. If the heating pan is a combination unit consisting of the solar-panel compartment, as well as the battery and transformer compartments, etc, the height of the heating pan may be determined by the accessories stored.

The interchangeable multi-purpose cooking apparatus and some accessories are portrayed in the Drawings No. 1-10.

Drawing No. 1 shows the front view of the interchangeable multi-purpose cooking apparatus heated by electric power, supplied by either solar or mains, as well as gas as a combination within one heating pan.

-   -   in Figure A, is a cross-section view     -   in Figure B is a top view.

Drawing No. 2 shows the front views of the interchangeable multi-purpose cooking apparatus heated by electric power.

-   -   in Figure A for using as a grill,     -   in Figure B for using as a cooker

Drawing No. 3 shows the electric heated heating pan:

-   -   in figure A a cross section, and     -   in Figure B a top view.

Drawing No. 4 shows a top view of the heating pan used as a cooker when heated by solar energy

Drawing No. 5 shows a top view of the heating pan used as a grill when heated by solar energy.

Drawing No. 6 shows front views of the interchangeable multi-purpose cooking apparatus heated by a fuel.

-   -   in Figure A for using as a grill, and     -   in Figure B for using as a cooker.

Drawing No. 7 shows the heating pan heated by a gaseous fuel:

-   -   in Figure A, a cross section     -   in Figure B a top view

Drawing No. 8 shows:

-   -   in Figure A, a cross section of the cooking pan, and     -   in Figure B a top view of the lid.

Drawing No. 9 shows the accessories for poaching and steaming.

-   -   in Figure A, a cross section of the poaching pan with a cup, put         onto the cooking pan     -   in Figure B, a top view of the poaching pan, and     -   in Figure C, a top view of the steaming disc.

Drawing No. 10 shows other functions

-   -   in Figure A, for use as a Chinese wok, and     -   in Figure B, for deep frying.

Drawing No. 1 portrays the interchangeable multi-purpose cooking apparatus where the heating mechanism can use electricity or gas within the same heating pan.

-   -   In Figure A is shown a cross section of the gas and electric         combination heated heating pan (1) and within the heating pan         (1) separating the different compartments at different levels of         the heating pan (1) are metal plates (4), (4 a), (4 b), (4 c),         (4 d) which are attached to the inner wall of the heating pan         (1). These compartments house the solar panels (10), the battery         (11), transformer (12). Connecting all the electrical components         is appropriate insulated wire cording (11 b). Closer to the         heating mechanism is a compartment with empty space for cooling         which is created by a nut (14 a) and is air-ventilated by         openings (6) through the heating pan (1). Bolts (14 b) and (14         c) are screwed into either ends of the long nut (14 a). For         better insulation, Bolts (14 b) and (14 c) do not directly touch         each other, but leave a space within the nut (14 a). The heads         of the bolts (14 b) are screwed firmly with washers to the metal         plate (4). The heads of the bolts (14 c) are screwed firmly with         washers to the metal plate (4 a) separating the insulation         compartment with insulation material (5), from the empty space.         Separating the insulation compartment from the transformer (12)         is metal plate (4 b). Separating the transformer (12) from the         battery (11) is metal plate (4 c). Separating the battery (11)         from the solar panels (10) is the metal plate (4 d). Appropriate         openings are made in all the metal plates (4), (4 a) (4 b), (4         c), (4 d) to accommodate the appropriate wiring. The top of the         heating pan (1) has a flange (9 a) that serves as a support for         the heating pan (1) when it is put up-side-down on the flange (9         b) of the cooking pan (2) for grilling. Two heat resistant         handles (8 a) are fixed onto the outer wall of the heating pan         (1). Into the side wall of the heating pan (1), just above the         gas burner (18) are punched protrusions (7). These protrusions         (7) serve as supports either for the cooling pan (2) or for the         grid (17) when used for other cooking methods. The side wall for         the heating pan (1) at the burner (18) height has big openings         (13) to provide for enough air supply. Gas is admitted through a         pipe (19) which passes through a handle (20) containing a gas         jet. This handle (20) pierces through the outer wall of the         heating pan (U) and connected to the handle (20) is a pipe (21)         which passes through the insulation material (5). The gas is         jetted into the heating pan (1) via pipe (21). This pipe (21)         then passes centrally through the metal plates (4 a) and (4).         The pipe (21) is screwed into the tube (22) which is centrally         situated in the heating compartment of the heating pan (1) and         the spherical dome (23). The gas burner (18) passes through the         centre of the spherical dome (23) and screws into the tube (22)         attaching the spherical dome (23) firmly to the metal plate (4)         within the heating compartment of the heating pan (1). The         spherical dome (23) is mounted into the heating pan (1) to         reflect radiant heat downwards when the heating pan (1) is put         up-side-down on the cooking pan (2). The spherical dome (23)         consists of a solid metal plate (24) and a perforated plate         (25). The perforated metal plate (25) is attached to the top of         the solid metal plate (24) by a solid wire (26) forming the dome         (23). The bottom solid plate (24) acts as a heat resistor to the         rest of the heating unit as well as a heating reflector. The         perforated plate (25) on top absorbs heat and creates radiant         heat for grilling. When using solar energy, the solar panels         (10) slide out of the heating pan (1) and are exposed to the         sunlight in order to charge the battery (11). It also shows the         electric element (16) embedded in the perforated plate (25) and         is coiled around with the electric elements cold ends passing         through the dome (23) the metal plate (4) through the empty         space, through metal plate (4 a) then through insulating         material (5) and finally through metal plate (4 b) and connect         into the transformer (12) where they will receive power from         either the battery (11) or mains (11 a). A wire cording (11 b)         connects the electric element (16), the mains (11 a), the         transformer (12), the battery (11) and solar panels (10). This         wire cording (11 b) may have appropriate insulation and length         as necessary.     -   In Figure B shows a top view of the heating pan (1) with flange         (9 a) and handles (8 a), the heating pan protrusions (7) and gas         handle (20) and the mains (11 a). Centrally situated within the         heating pan (1) is spherical dome (23) with the gas burner (18)         and the electric element (16) coiled around the spherical dome         (23).

Drawing No. 2 portrays the portable electric heated interchangeable multi-purpose cooking apparatus heated by electric power provided by mains or solar energy.

-   -   Figure A grilling with the heating pan (1) put upside down on         top of the cooking pan (2).     -   Figure B as a cooking pan for carrying out other cooking         operations, with the cooking pan (2) placed into the heating pan         (1). On the outer bottom of the heating pan (1) is mounted small         heat resistant feet (3). The heating pan (1) has a heating         compartment which is separated by a metal plate (4) and between         metal plate (4) and metal plate (4 a) is an empty space,         provided with openings (6) punched into the wall of the heating         pan (1) for air ventilation. Metal plate (4 a) separates the         empty space from the insulation material (5). Metal plate (4 b)         separates the transformer(12) from the insulation material (5),         and metal plate (4 c) separates the battery (11) from the         transformer (12). Metal (4 d) separates the battery (11) from         the solar panels (10). The heating pan has protrusions (7)         pressed into the side wall to support the cooking pan (2) or the         grid (17). Heat resistant handles (8 a) and (8 b) and flanges (9         a) and (9 b) are provided respectively with the heating pan (1)         and the cooking pan (2). On the bottom of the heating pan are         installed four solar panels (10), the battery (11) and the         transformer (12). The solar panels (10) slide out from the solar         panel compartment of the heating pan(1), to be used when the         cooking pan (2) is heated by solar energy.

Drawing No. 3 represents details of the heating pan, heated by electric power.

-   -   Figure A shows a cross section of the electric heating pan (1).         It consists of a heating compartment, and air-ventilated         compartment, which is empty, and an insulated compartment with         insulating material (5). Within the heating compartment on the         side wall of heating pan (1) are punched protrusions (7) which         are situated just above the electric element. These protrusions         (7) serve as supports either for the cooking pan (2) or for the         grid (17) when used for other cooking methods. The electric         element (16) is also mounted centrally within the heating         compartment and is supported by metal clips (15) which are         flexible so that they can be effortlessly bent to hold or         release the electric element (16). The electric element cold end         is connected through the wall of the heating pan (1) to the         mains connection (11 a). The bolts (14 b) pass through the metal         clips (15) which act as a washer then through the metal plate         (4) and screws into the long nut (14 a) which creates the empty         space between the metal plate (4) and metal plate (4 a). The         empty space is air-ventilated by openings (6). Between metal         plate (4 a) and the inner bottom of the heating pan (1) is a         compartment filled with insulation material (5). The bolts (14         c) pass through the outer bottom of the heating pan (1) through         the insulation material (5) and through the metal plate (4 a)         and screws into the long nut (14 a). At the ends of this bolt         (14 c) which is on the outer bottom of the heating pan (1) are         small heat resistant feet (3). The bolts (14 b) and (14 c) are         screwed into either end of the long nut (14 a) but do not         directly touch each other, but leave a space within the nut (14         a) for better insulation for the heat resistant feet (3). The         heating pan (1) has a flange (9 a) which serves as a support for         heating pan (1) when it is put up-side-down on the flange (9 b)         of the cooking pan (2) for grilling. Two heat resistant handles         (8 a) are fixed onto the outer walls of heating pan (1) for safe         handling.     -   Figure B shows a top view of the electric heated heating pan         (1). It shows the flange (9 a), the electric coil (16) the clips         (15), the heads of the bolts (14 b), the grid (17), put into the         heating pan (1) upon the protrusions (7), the mains connection         (11 a) and the two heat resistant handles (8 a).

Drawing No. 4 portrays a top view of the heating pan (1) heated by solar energy and used as a cooker. The solar panels (10) slide out of the heating pan (1) and are directed towards sunlight in order to charge the battery.

It shows the electric coil (16), the clips (15), the heads of the bolt (14 b), the grid (17), put into the heating pan (1) upon the protrusions (7), and the two heat resistant handles (8 a).

Drawing No. 5 portrays a top view of the heating pan (1) used as a grill and heated by solar energy.

The solar panels (10) slide out from the heating pan (1) and are turned to face the sun so that the cells absorb solar energy.

It shows the heat resistant feet (3), the solar panels (10) the flange (9 a) and the two heat resistant handles (8 a).

Drawing No. 6 portrays the interchangeable multi-purpose cooking apparatus heated by a fuel

-   -   Figure A—a grill with the heating pan (1) put upside down on top         of the cooking pan (2).     -   In Figure B as a cooking pan for carrying out other cooking         operations, with the cooking pan (2) put into the heating pan         (1). The cooking pan (2) rests upon the protrusions (7) which         are punched into the walls of the heating pan (1). Large         openings (13) allow adequate air-flow to the burner (18). Metal         plate (4) separates the heating compartment from the empty         space, air-ventilated by openings (6) and metal plate (4 a)         separates the empty space from the insulating compartment with         insulation material (5). On the outer bottom of the heating pan         are heat resistant feet (3). Gas is admitted through pipe (19),         which passes through a handle (20) containing a gas jet. This         handle (20) pierces through the outer wall of the heating pan         (1).

Drawing No. 7 portrays details of the heating pan (1) heated by gaseous fuel.

-   -   In Figure A is shown a cross section of the gas heated heating         pan (1) which has three main compartments: the heating         compartment, the empty space air-ventilated compartment and the         insulating compartment. The heating compartment within the         heating pan (1) is provided with a heating mechanism which is         made out of a spherical dome (23) which consists of a solid         metal plate (24) and a perforated plate (25). The two are         attached together by a solid wire (26) forming the dome (23).         The bottom of the solid plate (24) acts as a heat resistor to         the rest of the heating unit as well as a heat reflector. The         perforated plate (25) on top absorbs heat and creates radiant         heat for grilling when the heating pan (1) is placed on top of         the cooking pan (2). The dome (23) has a central hole allowing         the burner (18) to pass through and screw into the tube (22).         This tube (22) is centrally situated between the dome (23) and         the metal plate (4) and acts also as a spacer between the two.         Below the metal plate (4) is an empty space created by nuts (14         a) and bolts (14 b) and (14 c). This empty space is between the         metal plates (4) and (4 a). On the outer wall of the empty space         section of the heating pan (1) are openings (6) for         air-ventilation. Between plate (4 a) and the bottom of the inner         heating pan (1) is situated the insulating compartment with         insulation material (5). Gas is admitted through a pipe (19)         which passes through a handle (20) containing a gas jet. This         handle (20) pierces through the outer wall of the heating pan         (1) and connected to the handle (20) is a pipe (21) which passes         through the insulation material (5). The gas is jetted into the         heating pan (1) via pipe (21). This pipe (21) then passes         centrally through the metal plates (4 a) and (4). The pipe (21)         is screwed into the tube (22) which is centrally situated in the         heating compartment of the heating pan (1) and the spherical         dome (23). The gas burner (18) passes through the centre of the         spherical dome (23) and screws into the tube (22) attaching the         spherical dome (23) firmly to the metal plate (4) within the         heating compartment of the heating pan (1). Large openings (13)         are provided within the heating unit of the heating pan to allow         adequate air supply to the burner (18). Protrusions (7) are         provided just above large openings (13) to provide support to         the cooking pan (2) or grid (17). On top of the heating pan (1)         flange (9 a) is shown, and heat resistant handles (8 a) are         provided for safe handling. The bolts (14 c) pass through the         bottom of the heating pan (1), through the insulation material         (5), through the metal plate (4 a) and screw into the bottom of         the long nut (14 a). Onto the head of the bolts (14 c) are         attached heat-resistant feet (3).     -   In Figure B—is a top view of the fuel heated heating pan (1)         showing the perforated spherical dome (23) the gas burner (18)         the gas pipe (19) the handle with jet (20) the grid (17) put         into the heating pan (1) upon the protrusions (7) the heat         resistant handles (8 a) and the flange (9 a) on top of the         heating pan (1).

Drawing No. 8 portrays:

-   -   In Figure A a cross section of the cooking pan (2) with a flange         (9 b) at the top and two heat resistant handles (8 b) on the         side wall.     -   In Figure B a top view of the lid (27) for the cooking pan (2)         with a heat resistant knob (28) in the centre. The lid (27) is         put upon the cooking pan (2) whenever appropriate.

By installing clips on the rim of the lid that fits upon the flange of the cooking pan, the latter can be used as a pressure cooker by firmly closing the clips. It will be preferable to use a rubber seal ring to have a good closure.

Drawing No. 9 illustrates the accessories for poaching eggs and steaming.

-   -   In figure A is shown a cross section of the poaching pan (29)         inserted into the cooking pan (2). The poaching pan (29) has a         flange (30), which rests upon the flange (9 b) of the cooking         pan (2). On the bottom of the poaching pan (29) are large         openings (31). The poaching cups (32) are provided with long         handles (33) and fit into the large openings (31). On top of the         cooking pan (2) enclosing the poaching pan (29) and resting on         flange (9 b). is the lid (27) with a heat resistant knob (28).     -   In Figure B is shown the bottom of the poaching pan (29) with         the large openings (31) and the flange (30).     -   In figure C is illustrated a steamer plate that is a disc (34)         fitting into the pan with large openings (29) and has small         holes (35) all over the surface. The disc (34) is laid down upon         the bottom of the pan with large openings (29). The disc (34)         will stay down by the weight of the food to be steamed and the         divider, if used.

Drawing No. 10 illustrates some other uses of the interchangeable multi-purpose cooking apparatus.

-   -   Figure A portrays the use as a Chinese wok (36) on a gas heated         heating pan (1), resting on grid (17), and     -   Figure B portrays a deep-fry basket (37) which can be put into         the cooking pan (2) for deep-frying.

According to the cooking procedure the following configuration of the interchangeable multi-purpose cooking apparatus is installed.

-   -   For grilling: the heating pan is put upside down upon the         cooking pan and the grid is put on the bottom of the cooking         pan.     -   For other methods of cooking: The grid may be installed into the         heating pan converting the heating pan into a normal stove.         Alternatively the cooking pan is installed into the heating pan         and the lid may be put on top of the cooking pan.     -   Poaching is carried out by installing the cooking pan into the         heating pan, the poaching pan into the cooking pan. Within the         large openings of the poaching pan are installed the poaching         cups and the lid is put on top of the cooking pan.

It is understood that the Drawings, measurements and shapes given are exclusively illustrative.

Also other accessories can be added, such as a divider when steaming, to have separate steaming sections. On the grid can be put fire stones for a barbecue or any other pot. The heating pan and cooking pan can also be used as a fondue set by providing fondue skewers or as a baker. It will also be possible, when camping and the heating is provided by fuel, to replace the burner head of the heating pan with a lighting lamp and to use the heating pan as a lighting device, or as a heater.

Although preferred embodiments of the present invention has been mentioned, it will be appreciated by those skilled in the art, that variations may be made thereto, without departing from the spirit of the invention or the scope of the appended claims. For instance, some of the heating means of the heating pan can be deleted or the heating unit can be limited to only one heating pan heated by electric power or by burning a fuel or a combination of both. 

1. An interchangeable multi-purpose cooking apparatus characterized that it contains a heating unit with different heating mechanisms, or a mechanism that can utilize gaseous fuels or electricity provided by solar or mains, within the same heating pan, and a cooking pan with accessories to be mounted on the cooking pan, that are all mutually interchangeable:
 2. An interchangeable multi purpose cooking apparatus, according to claim 1, characterize that: the heating unit is a heating pan with interchangeable heating mechanisms that is either a fuel burner or an electric element heated by electric power, supplied directly from the mains or from a battery charged by solar energy, that the cooking pan (2) fits into the heating pan (1), that the heating pan (1) fits upon the cooking pan (2), when put upside down so that the heating pan (1), and the cooking pan (2) are in interchangeable positions, and that the accessories comprise (see Drawings8 to 10): a lid (27), which fits upon the cooking pan (2) a grid (17), which fits into the cooking pan (2) and heating pan (1) a pan (29) with large openings(31) cups (32) which fit into the large openings(31), and a disc (34 with small openings (35) fitting into the pan with large openings (29).
 3. A heating pan for the interchangeable multi-purpose cooking apparatus according to claim 1 characterized that the heating pan has protrusions (7), pressed into the side just above the heating device, to hold the grid (17) or the cooking pan (2), a flange (9 a) on the top, to hold the heating pan (1) when put upside down on the cooking pan (2), insulation at the inner or outer bottom of the heating pan and is supported by heat resistant structure such as feet (3).
 4. The heating pan for the interchangeable multi-purpose cooking apparatus according to claim 3 characterized that it is divided into two sections by a metal plate (4) whereby the lower section is filled with insulation material (5) and empty space with small openings (6) in the wall, and that a bolt passes through the insulation material (5) and through the metal plate (4) into one end of a long nut (14 a) and that bolt is composed of two bolts (14 b) and (14 c), screwed into either ends of the long nut (14 a).
 5. An electric heated heating pan for the interchangeable multi-purpose cooking apparatus according to claim 1 characterized that an electric regulated coil (16) of 500 to 1200 watt or more is used, which is mounted into the heating pan (1) with flexible clips (15) whereby the bottom end of the clip acts as a washer for the bolt(14 b) and that the top of the clip (15) holds the electric coil (16) in position.
 6. The electric heated heating pan for the interchangeable multi-purpose cooking apparatus according to claim 5 characterized that it is provided with solar panels (10) that can slide out and into the bottom of the heating pan, can be turned around so that the solar cells always face the sun and are removable so to be positioned in the most suitable place to receive solar energy.
 7. A heating pan for the interchangeable multi-purpose cooking apparatus according to claim 3 characterized that for heating by a fuel that creates a naked flame, a structure creating radiant heat is installed in the heating pan and that in the side wall of the heating pan are big openings (13) which areas can be regulated to ensure adequate air supply.
 8. A structure creating radiant heat according to claim 7 characterized that it consists of a dome (23), composed of a solid metal dome (24) upon which is mounted, at a distance, a perforated metal dome (25) whereby the base of the fuel burner head (18) passes centrally through the dome (23) and screws into the tube (22) securing the dome (23) to the fuel burner head (18), that at the lower end of the tube (22) is screwed the gas pipe (21) which passes centrally through the bottom of the heating pan (1) securing the burning device to the heating pan (1), that the gas pipe (21) passes centrally through the empty space, the metal plate (4), the insulation material (5) and passes through the outer wall of the pan where it is joined to the gas jet screwed into the handle (20) onto which the fuel supply pipe (19) is attached.
 9. A method of cooking using the interchangeable multi-purpose cooking apparatus according to claim 1 characterized that, for grilling, the heating pan is put upside down on the cooking pan
 10. A method of poaching using the interchangeable multi-purpose cooking apparatus according to claim 1 characterized: that the cooking pan is put into the heating pan, that the pan with large openings is put into the cooking pan that the large openings are filled with small cups, and that a lid is put upon the cooking pan.
 11. A method of steaming using the interchangeable multi-purpose cooking apparatus according to claim 1 characterized that the cooking pan is put into the heating pan, that the pan with the large openings is put into the cooking pan, that the plate with the small holes is laid down upon the bottom of the pan with large openings, that a divider is put on the plate with small openings, and that a lid is put upon the cooking pan.
 12. The use of the interchangeable multi-purpose cooking apparatus according to claim 1 as a normal stove, a grill, a frying pan, a barbecue, a baker, a steamer, a poacher, a chip fryer, a fondue, a Chinese wok and with some small modifications as a pressure cooker or even as a lighting device, or a heater.
 13. A heating pan for the interchangeable multi-purpose cooking apparatus according to claim 2 characterized that the heating pan has protrusions (7), pressed into the side just above the heating device, to hold the grid (17) or the cooking pan (2), a flange (9 a) on the top, to hold the heating pan (1) when put upside down on the cooking pan (2), insulation at the inner or outer bottom of the heating pan and is supported by heat resistant structure such as feet (3).
 14. The heating pan for the interchangeable multi-purpose cooking apparatus according to claim 13 characterized that is divided into two sections by a metal plate (4) whereby the lower section is filled with insulation material (5) and empty space with small openings (6) in the wall, and that a bolt passes through the insulation material (5) and through the metal plate (4) into one end of a long nut (14 a) and that bolt is composed of two bolts (14 b) and (14 c), screwed into either ends of the long nut (14 a).
 15. An electric heated heating pan for the interchangeable multi-purpose cooking apparatus according to claim 14 characterized that an electric regulated coil (16) of 500 to 1200 watt or more is used, which is mounted into the heating pan (1) with flexible clips (15) whereby the bottom end of the clip acts as a washer for the bolt(14 b) and that the top of the clip (15) holds the electric coil (16) in position.
 16. A heating pan for the interchangeable multi-purpose cooking apparatus according to claim 13 characterized that for heating by a fuel that creates a naked flame, a structure creating radiant heat is installed in the heating pan and that in the side wall of the heating pan are big openings (13) which areas can be regulated to ensure adequate air supply.
 17. A heating pan for the interchangeable multi-purpose cooking apparatus according to claim 4 characterized that for heating by a fuel that creates a naked flame, a structure creating radiant heat is installed in the heating pan and that in the side wall of the heating pan are big openings (13) which areas can be regulated to ensure adequate air supply.
 18. A heating pan for the interchangeable multi-purpose cooking apparatus according to claim 14 characterized that for heating by a fuel that creates a naked flame, a structure creating radiant heat is installed in the heating pan and that in the side wall of the heating pan are big openings (13) which areas can be regulated to ensure adequate air supply.
 19. A structure creating radiant heat according to claim 16 characterized that it consists of a dome (23), composed of a solid metal dome (24) upon which is mounted, at a distance, a perforated metal dome (25) whereby the base of the fuel burner head (18) passes centrally through the dome (23) and screws into the tube (22) securing the dome (23) to the fuel burner head (18), that at the lower end of the tube (22) is screwed the gas pipe (21) which passes centrally through the bottom of the heating pan (1) securing the burning device to the heating pan (1), that the gas pipe (21) passes centrally through the empty space, the metal plate (4), the insulation material (5) and passes through the outer wall of the pan where it is joined to the gas jet screwed into the handle (20) onto which the fuel supply pipe (19) is attached.
 20. A structure creating radiant heat according to claim 18 characterized that it consists of a dome (23), composed of a solid metal dome (24) upon which is mounted, at a distance, a perforated metal dome (25) whereby the base of the fuel burner head (18) passes centrally through the dome (23) and screws into the tube (22) securing the dome (23) to the fuel burner head (18), that at the lower end of the tube (22) is screwed the gas pipe (21) which passes centrally through the bottom of the heating pan (1) securing the burning device to the heating pan (1), that the gas pipe (21) passes centrally through the empty space, the metal plate (4), the insulation material (5) and passes through the outer wall of the pan where it is joined to the gas jet screwed into the handle (20) onto which the fuel supply pipe (19) is attached. 